[C#]获取一年中是第几个星期

关键代码：

        /// <summary>
        /// 获取日期是一年中第几个星期
        /// </summary>
        /// <param name="date">需要计算的时间</param>
        /// <returns>一年中第几个星期</returns>
        public static int GetWeekNumber(this DateTime date)
        {
            var _cultureInfo = CultureInfo.CurrentCulture;
            return _cultureInfo.Calendar.GetWeekOfYear(date, CalendarWeekRule.FirstDay, DayOfWeek.Sunday);
        }

希望有所帮助！
.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }